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  • Icebreaker BodyfitZONE™ construction combines lightweight 200g stretch merino wool with strategically placed merino mesh panels for ventilation
  • Anatomic cut for superior fit
  • Gusseted for comfort and mobility
  • Flatlock stitching keeps these bottoms from chafing during long days of dynamic motion
  • Corespun fabric for enhanced durability


View all Icebreaker Men's Long Underwear Bottoms

REI membership


Best Use Snowsports
Fabric 96% merino wool/4% Lycra spandex
Moisture Wicking Yes
Quick Drying Yes
Underwear Weight Lightweight
Inseam (in.) Unavailable
Gender Men's

Size chart

Sizing notes

Measurements are stated in inches unless otherwise indicated. CHOOSING THE RIGHT SIZE: If your body measurements are midway between two sizes, select the smaller size for a tighter fit or the larger size for a looser fit. If your body measurements result in different sizes, we recommend using your chest measurement for tops and your hip measurement for pants.

Rated 5 out of 5 by from Great Fit These leggings fit great. I wear a base layer everyday in the winter months for work and these are by far the best pair I have. They seem to control temperature very well, better than other base layers I have. I will most likely get a couple more pairs for this winter.
Date published: 2016-12-13
Rated 5 out of 5 by from Crossfit I use these for crossfit on cooler mornings. Work great and do not seem to impact performance adversely. Seems like they do not smell for longer than my other garments.
Date published: 2016-05-16
Rated 5 out of 5 by from These leggings did not survive the dryer I'm an Englishman living in Denver Colorado,no stranger to the cold.I bought the bodyzone leggings,socks and baselayer shirts in Dunedin, New Zealand in December! This clothing works really really well,I've tried them all,Merino is by far the best way to go,just don't put it in the dryer! I ordered a new pair online and they arrived in no time at all.Perfect fit,,super comfortable straight out of the box,just don't put them in the dryer!
Date published: 2017-02-10
Rated 5 out of 5 by from Most comfortable leggings I've ever worn. I work as a ski instructor in Colorado. These leggings are by far the most comfortable and functional of any I've worn. I can wear them for 4 or 5 days without needing to wash. The material is very soft and warm, they fit very well.
Date published: 2017-01-29
Rated 5 out of 5 by from Ordered For My Dad Ordered these for my 87 year old Dad that is always cold. He wears them around the clock and absolutely loves them!
Date published: 2017-01-01
Rated 5 out of 5 by from Perfect legging for someone who always overheats! As someone who always struggles with body temperature regulation,this pants are the perfect layer to keep warm but breath enough when being extremely active.
Date published: 2017-03-09
Rated 5 out of 5 by from My first purchase Purchased these for a trip to Iceland. Customer service was very helpful and the items they guided me to purchase were very high quality
Date published: 2016-12-31
Rated 5 out of 5 by from Snowshoe Heaven Great product with added benefit of flexibility and venting behind knees and other areas.
Date published: 2017-01-02
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I'm curious as to the weight of these. I assume they are heavier (and more robust) than silk but details would be useful.

Asked by: trailrat
​The size medium weighs 6.24 oz.
Answered by: REIservice
Date published: 2017-05-04

I want to wear these under wadders in the summer. Temps range from 90 to 50. Are these a good option for hot sweaty hiking in wadders - 8 days on a river and rotating pairs etc.. Limited fly in weight....

Asked by: Lance
These are constructed with lightweight material that is suitable for 50 degree temperatures. However, we believe these will be too substantial for temperatures approaching 90 degrees.
Answered by: REIservice
Date published: 2017-05-02

Do these have a fly?

Asked by: alpinehap
No, the Zone leggings do not have a fly.
Answered by: REIservice
Date published: 2017-04-06
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